Insertible-tooth saw



(No Model.) G. F. SIMONDS.

INSERTIBLB TOOTH SAW.

- No.4 326,685. Patented 861112.22, 1885( JNVENTOH W/ TNESSES,

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UNTTa TaTns aTnNT lNSERTlBLE-TOOTl-i SAW.

SPECIFICATIOI" forming part of Letters Patent 1\'l'o- 326,685, datedSeptember 22, 1885.

Application filed July 7,1885.

To all whom, it may concern:

Be it known that I, GEO. F. SrMoNDs, of Fitchburg, in the county ofTorcester and State of Massachusetts, have invented certain Improvementsin Inserted-Tooth Saws; and I hereby declare the following to be afull,clear, and exact description of the same, reference being had tothe accompanying drawingsnnak ing part of this speciication, in which-Figure l is a side elevation of a portion of a saw-plate provided withthe improved inserted tooth. Fig. 2 is a side elevation of a section ofa saw-plate with the tooth and gullet removed. Fig. 3 is a perspectiveview of the removable point. Fig. 4 is a perspective view of theremovable gullet. Fig. 5 is a crosssectional view on the line x x ofFig. 1.

My invention relates to that class of inserted-tooth saws wherein thepoint is secured to the saw-plate by means of a removable gullet sprunginto the recess in the plate, and has for its object to so strengthenthe removable gullet that it may be made narrower than heretofore withsafety, and thereby enable me to increase the size of the pocket orspace within the gullet for carrying the dust, and at the same timebroaden the face of the gullet and tooth, so as to make proper clearancein the out or kerf.

In the respects named my present invention is an improvement on theinvention described and claimed in an application filed by me'April 22,1885,Serial No. 163,032.

In order that those skilled in the art may makeand use my invention, Iwill proceed to describe the manner in which I have carried it out.

In the said drawings, A is a section of a saw-plate provided with therecess B, for the reception of the removable gullet and tooth, the saidrecess being cut in the arcs of two circles of different radii,butstruck from about the same center. The removable gullet C has its rearedge grooved at a to fit over the beveled edge a of the recess B, andits body b is made of a thickness greater than the thickness of thesaw-plate, while each exterior rear edge is beveled off, as seen at d d,so that the lowest lines of the beveled edges are coincident with theplane of the saw-plate when the gullet abuts against the plate. The in-(o model.)

serted point D is provided with a swaged cutting-edge, c, as is usual insuch cases, and has its body formed with a thickness of metal greaterthan the thickness of the saw-plate, but equal to the thickness of thebody b of the removable gullet C. The rear exterior edges ofthe point Dare beveled, as seen at i t', so that the lowest line of the bevels arecoincident with the planes or faces of the saw-plate when the point isset. rI`he rear edge of the point is provided with a groove, l, to tover the beveled edge l of the recess B. The base of the point wheninserted and in place rests against the projection n, cut in thesaw-plate and connecting the two arcs in which rest the bodies of theremovable gullet and tooth.

By means of the construction of tooth and gullet described andillustrated I am not only enabled to manufacture them at a less costthan heretofore, but the weight of metal obtained by thickening the bodyof the tooth and the body of the gullet enables me to increase theinterior curve of the gullet, and thereby increase the size of thedust-carry ing pocket, and yet maintain the requisite strength necessaryto the successful working of the saw, every fraction of increase in thesize ofthe dust-carrying pocket being of the greatest value inv theperfection of work performed by a circular saw.

I am aware that heretofore the workingfaces of removable gullets andremovable teeth for circulaisaws have been swaged to a dimension greaterthan the thickness of the sawplate; but in such cases the strength ofthe parts has not been so increased as to have them narrower, andthereby increase the size of the gullet or pocket materially, as is thecase with my invention.

Having thus described my invention,what I claim as new, and desire tosecure by Letters Patent, is-

l. The removable gullet C, having its body thicker 'than the saw-plate,in combination with a recessed saw plate and tooth, substantially asdescribed.

2. The removable gullet C, having its body thicker than the saw-plateand its rear exterior edges beveled, as shown at d d, in combinationwith a recessed plate and a tooth, 'for the purpose set forth.

IOC

3. The removable tooth D, having its body nation with a holding deviceand a recessed thicker than the saw-p1ate,as speciied,in comesew-plate,substantially as set forth. bination with a holding device and a.recessed plate, as described. 5 4. The removable tooth D, having itsbody Vitnesses:

thicker than the sawplate and its rear exte- ALoNzo H. STEWART, rioredgesv beveled, as shown at z' z', in combi- CHAs. S. HAYDEN.

GEO. F. SIMONDS.

